The most significant crustal feature on Mars is the hemispheric dichotomy–a physiographic divide between the southern hemisphere (heavily cratered highlands) and the northern hemisphere (relatively smooth plains). The southern highlands cover ~2/3 of Mars and are ~2–4 km higher than the northern lowlands. This area is composed of heavily cratered, relatively old geologic units mainly… Continue reading Mars | Hemispheric Dichotomy
Emily Zawacki, Ph.D. 